var xxx=1;
function addnewtab() {
        var $tab_title_input = $( "#tab_title"),
            $tab_content_input = $( "#tab_content" );
        var tab_counter = 2;

        // tabs init with a custom tab template and an "add" callback filling in the content
        var $tabs = $( "#tabs").tabs({
            tabTemplate: "<li><a href='#{href}'>#{label}</a> <span class='ui-icon ui-icon-close'>Remove Tab</span></li>",
            add: function( event, ui ) {
                var tab_content = $tab_content_input.val() || "Tab " + tab_counter + " content.";
                $( ui.panel ).append( "<div id='toi"+xxx+"'></div>" );
                $('#toi'+xxx).load('../templates/vi/management/main_users.html');
                xxx++;
            }
        });

        // modal dialog init: custom buttons and a "close" callback reseting the form inside
        var $dialog = $( "#dialog" ).dialog({
            autoOpen: false,
            modal: true,
            buttons: {
                Add: function() {
                    addTab();
                    $( this ).dialog( "close" );
                },
                Cancel: function() {
                    $( this ).dialog( "close" );
                }
            },
            open: function() {
                $tab_title_input.focus();
            },
            close: function() {
                $form[ 0 ].reset();
            }
        });

        // addTab form: calls addTab function on submit and closes the dialog
        var $form = $( "form", $dialog ).submit(function() {
            addTab();
            $dialog.dialog( "close" );
            return false;
        });

        // actual addTab function: adds new tab using the title input from the form above
        function addTab() {
            var tab_title = $tab_title_input.val() || "Tab " + tab_counter;
            $tabs.tabs( "add", "#tabs-" + tab_counter, tab_title );
            tab_counter++;
        }

        // addTab button: just opens the dialog
        $( "#add_tab" )
            .button()
            .click(function() {
                $dialog.dialog( "open" );
            });

        // close icon: removing the tab on click
        // note: closable tabs gonna be an option in the future - see http://dev.jqueryui.com/ticket/3924
        $( "#tabs span.ui-icon-close" ).live( "click", function() {
            var index = $( "li", $tabs ).index( $( this ).parent() );
            $tabs.tabs( "remove", index );
        });
    }